PDF malware analysis — malicious · f8d1a6230ea73df6

MALICIOUS

PDF

9.6 KB

MD5: 517669520d0494a73422b7c31cf9a521 SHA-1: 0b1d5f000c32d838a9704b06f6b8a8a7fef7b854 SHA-256: f8d1a6230ea73df6ae0faff6b7c91739603ce0f365d67283b2f8bdcdc7a76ec0

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript that exploits the CVE-2007-5659 vulnerability. The JavaScript is obfuscated and uses the `unescape()` function, indicating an attempt to hide malicious code. The `Collab.collectEmailInfo` method is a known indicator of this exploit. The file is detected by ClamAV as Pdf.Exploit.Agent-35905, confirming its malicious nature. The primary attack vector is likely through a user opening a malicious PDF attachment.

Heuristics 6

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-35905 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35905
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `d8a6b4ad1abf04d0c4a4f89535cfb57f7312edef25c443f4e844c8ec9d0929dd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	352 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `31ce065f51d0e68e3b75609aadd7dc7b04e674c473175104cf5390d7340e5323`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12390 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `49b6c3c672e0ce486f7c9fc33bb4b72e9ba34002c7a7769d8e745b88f7dc0c77`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5167 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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